[okular] [Bug 492529] okular is very slow opening some PDFs

[William Bader]

https://bugs.kde.org/show_bug.cgi?id=492529

--- Comment #2 from William Bader <williambader at hotmail.com> ---
Hopefully viewing the PDF with a profiling build of okular will identify the
problem. I think that okular, atril, and evince all use libpoppler as the
back-end for PDFs, and usually okular is faster, I think because atril and
evince do an extra layer of copying internally.
My laptop is using xorg-x11-server-Xorg-1.20.14 and
xorg-x11-drv-nvidia-560.35.03 with an NVIDIA GeForce RTX 3050 Laptop GPU.
Fedora 40 has poppler-24.02.0
Maybe the PDF has a large image with a color format that doesn't match any of
the formats provided by X.
pdftops -level1sep takes 54 seconds, while pdftops -level2 takes under 1
second, so maybe okular is interfacing with poppler in a way that poppler think
that it needs to use splash.

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